Crown structure of zipper head

ABSTRACT

A crown structure of zipper head includes a crown and a resilient sheet. A reception cavity is indented from a bottom surface of the crown. Two abutment portions are formed at the side portions of the bottom face of the reception cavity. A recess portion is defined between the two abutment portions. The crown includes a side wall elongated respectively along the lateral side of the crown. A passage is formed respectively at the mid section of the sidewall and communicates with the reception cavity. A stop portion is disposed on each lateral side of the crown and adjacent to the passage. The resilient sheet is disposed in the reception cavity and abuts the stop portions. The resilient sheet has a through hole at each end respectively, and two opposed troughs are formed at the mid section of the lateral sides of the resilient sheet.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The instant disclosure relates to a crown structure, in particular, to a crown structure, applied with a resilient sheet therein, mounted onto a zipper head.

2. Description of Related Art

The conventional zipper head structure includes a body, a pull-tab, a resilient sheet, and a crown. The zipper head engages to the teeth, and there is a locking hook inside the body. When the pull-tab of the body is jerked, the pull-tab drags the locking hook to free the zipper head from the teeth. When the pull-tab of the body is stopped pulling, the resilient sheet will press the locking hook to lock onto the teeth in a locking position, such that the body does not slide off.

With respect FIG. 1, the conventional zipper head (not shown) is implemented with a baking varnish process after assembly. Often, the crown 1 a is over-coated with a varnish layer 101 a, which overfills the zipper head. Besides, the resilient sheet 201 a covered with the varnish layer 101 a creates extra width, which would choke the crown 1 a and requires more effort to pull the zipper head.

With the issue of varnish layer 101 a overfilling the zipper head after the baking varnish process, the conventional solution is to modify the structural configuration of the crown 1 a. The lateral sides of the crown 1 a are curved outward, in forming a larger space therein to accommodate the extra varnish layer 101 a. However, the curved structure will affect the strength of the structure of the crown 1 a. Namely, the crown 1 a would deform easily during the manufacturing process.

To address the above issue, the inventor researched and utilized engineering principles in providing a solution to resolve the above-mentioned shortcoming.

SUMMARY OF THE INVENTION

In view of the aforementioned issues, a crown structure of the zipper head is disclosed. The issue is to solve the problem that the resilient sheet is choked by the over-coated varnish layer after the assembly of the zipper head.

Another object according to the present invention is to optimize the flexibility of the resilient sheet, in order to smooth the sliding of the zipper head and to save the labor effort.

To achieve the above-mentioned objectives, the present invention provides a crown structure of zipper head including a crown and a resilient sheet. The crown defines a reception cavity indented from a bottom surface of the crown, and two abutment portions formed at two lateral sides of the reception cavity. A recess portion is defined between the two abutment portions. The surface of the recess portion is lower than that of each abutment portion. The crown includes an elongated side wall arranged at each lateral side thereof. A passage is formed at the middle portions of the side walls that communicate with the reception cavity, and a stop portion is disposed on each lateral side thereof and the stop portion being adjacent to the passage. The resilient sheet is disposed in the reception cavity and abuts the two stop portions. The resilient sheet has a through hole separately on both ends, and two opposed troughs are formed at the mid section of the sides of the resilient sheet.

It is worth mentioning that there are some advantages as follows: the crown and the resilient sheet are assembled as a whole component first, and then the component is assembled to the zipper head. Therefore, the assembling steps are simplified. The two through holes help to optimize the flexibility and rigidity of the resilient sheet, thus allowing the zipper head to operate with less effort and more smoothly. In addition, the two troughs of the resilient sheet will solve the choke problem due to over-coated varnish layer and improve the issue of resistance upon pulling the zipper head.

In order to further understand the techniques, means and effects the present invention takes for achieving the prescribed objectives, the following detailed descriptions and appended drawings are hereby referred, such that, through which, the purposes, features and aspects of the present invention can be thoroughly and concretely appreciated; however, the appended drawings are merely provided for reference and illustration, without any intention to be used for limiting the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top view of a crown structure of the conventional zipper head;

FIG. 2 is a perspective view of a crown structure of the zipper head in accordance with a first preferred embodiment according to the present invention;

FIG. 3 is an exploded view of the crown structure of the zipper head in accordance with a first preferred embodiment according to the present invention;

FIG. 4 is a top view of the crown structure of the zipper head in accordance with a first preferred embodiment according to the present invention;

FIG. 5 is a cross-sectional profile of line 5-5 in FIG. 4;

FIG. 6 is a view illustrating the deformation of a resilient sheet;

FIG. 7 is a top view of the crown structure of the zipper head, showing the through holes in a closed configuration in accordance with a first preferred embodiment after varnishing according to the present invention;

FIG. 8 is a top view of the crown structure of the zipper head, showing the through holes in an open configuration in accordance with a first preferred embodiment after varnishing according to the present invention;

FIG. 9 is a perspective view of a crown structure of the zipper head in accordance with a second preferred embodiment according to the present invention; and

FIG. 10 is a perspective view of a crown structure of the zipper head in accordance with a third preferred embodiment according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to FIGS. 2 and 3, in which a crown structure of the zipper head of a first preferred embodiment according to the present invention is disclosed. The crown structure of the zipper head includes a crown 1 and a resilient sheet 2. The crown 1 defines a reception cavity 11 indented from a bottom surface 17 thereof. There are two abutment portions 12 formed on the left and right portions of the bottom face respectively of the reception cavity 11. A recess portion 13 is defined between the two abutment portions 12, and the surface of the recess portion 13 is lower than that of each abutment portion 12. The crown 1 has a side wall 14 respectively in the lateral direction, and a passage 15 is formed respectively at the mid section of the side wall 14 and communicates with the reception cavity 11. A stop portion 16 is disposed on the side wall 14 respectively, and the stop portion 16 is adjacent to the passage 15. The resilient sheet 2 is disposed in the reception cavity 11 and abutting to the stop portions 16. The resilient sheet 2 has a through hole 21 at the respective ends, and a trough 22 is formed respectively at the mid section of the lateral side of the resilient sheet 2. The resilient sheet 2 is bended symmetrically in forming a V-shaped body, where the top portion, or the bended portion, forms a curved end 23.

Referring to FIGS. 4 and 5, the resilient sheet 2 is assembled into the reception cavity 11. The two opposite ends of the resilient sheet 2 are disposed on the two abutment portions 12 of the crown 1. The curved end 23 of the resilient sheet 2 abuts against a locking hook of the body (not shown).

With respect to FIG. 6, when the zipper head is pulled, the locking hook releases and abuts against the curved end 23 of the resilient sheet 2. The curved end 23 deforms toward the recess portion 13 and lowers to a preferable position.

The recess portion 13 is set among the two abutment portions 12 and the two side walls 14. The two stop portions 16 are formed by bending from the corresponding side wall 14 toward the reception cavity 11. The two stop portions 16 are set diagonally. The stop portions 16 are used to prevent the resilient sheet 2 from separating off from the crown 1 while the zipper head is being pulled. The corners of the troughs 22 of the resilient sheet 2 are arch-shaped.

When assembling the zipper head, the resilient sheet 2 is disposed into the crown 1 as a whole component. A pull-tab (not shown) is disposed on the passage 15 of each side wall 14, and the whole component could be set onto the body.

After the assembly of the zipper head, a baking varnish process is required. A varnish layer 101, as shown in FIG. 7, is coated onto the zipper head and in the reception cavity 11. The redundant varnish layer 101 inside the reception cavity 11 is accommodated through space optimization by the troughs 22. Therefore, the issue of over-coated varnish layer 101 is prevented so that the choke problem of the resilient sheet 2 is solved.

With respect to FIGS. 7 and 8, the through holes 21 of the resilient sheet 2 can decrease the rigidity of the resilient sheet 2 to create better flexibility. The improved resilient sheet 2 allows less effort to drag the locking hook. Each of the through holes 21 defines a closed configuration on the resilient sheet 2. Alternatively, each through hole 21 can be fully slotted outwardly to define an open configuration on the resilient sheet 2. The configuration of each through hole 21 is not restricted. The through holes 21 are used to expel the waste materials from the resilient sheet 2, in which the open or closed configuration of the through holes 21 does not affect the waste disposal.

Referring to FIG. 9 for the second embodiment of the instant invention. The crown 1 includes a plurality of apertures 18 disposed on the side walls 14, and two stop levers 3 disposed in the reception cavity 11. The stop levers 3 engage with the apertures 18 and span across the reception cavity 11 to suppress the two ends of the resilient sheet 2, in order to prevent the resilient sheet 2 separating from the crown 1.

With respect to FIG. 10 of the third embodiment of the instant disclosure, the crown 1 further comprises two module plates 4, which are disposed in the reception cavity 11 and on the side portions of the crown 1 above the abutment portions 12. The module plates 4 engage the two ends of the resilient sheet 2, in order to prevent the separation of the resilient sheet 2 from the crown 1 while pulling the zipper head

Based on the above, the instant invention has the following advantages. First, the two through holes 21 reduce the rigidity of the resilient sheet 2, thus allowing greater flexibility inside the recess portion 13 of the crown 1. By mounting the improved resilient sheet 2 onto the zipper head, the zipper head can be pulled with less effort than before. Besides, the through holes 21 can expel the waste materials after the resilient sheet 2 has being stamped during the manufacturing process. Secondly, the troughs 22 of the resilient sheet 2 can help to improve the issue of over-coated varnish layer from the baking varnish process of the zipper head. Also, the resistance can be minimized for pulling the zipper head. Besides, losses due to product downgrades can be reduced significantly, thus enhancing the product quality and reducing costs.

The above-mentioned descriptions represent merely the preferred embodiments of the present invention, without any intention to limit the scope of the present invention thereto. Various equivalent changes, alternations or modifications based on the claims of present invention are all consequently viewed as being embraced by the scope of the present invention. 

1. A crown structure of zipper head, comprising: a crown having a bottom surface indented in forming a reception cavity, two abutment portions being formed at the side portions of the reception cavity, a recess portion defined in between the abutment portions and the surface of the recess portion being lower than that of the abutment portion, a side wall being elongated respectively along the lateral side of the crown, a passage formed respectively at the mid section of the side wall and communicates with the reception cavity, a stop portion being disposed respectively on each side wall and adjacent to the passage; and a resilient sheet disposed in the reception cavity and abutting the stop portions, the resilient sheet having a through hole at each end respectively in a closed configuration, a trough formed respectively on the corresponding mid section of the lateral side of the resilient sheet.
 2. The crown structure of zipper head according to claim 1, wherein the stop portions are formed by bending from the corresponding side wall toward the reception cavity.
 3. The crown structure of zipper head according to claim 1, wherein the recess portion is formed in between the two abutment portions and the two side walls.
 4. The crown structure of zipper head according to claim 1, wherein the two stop portions are set diagonally.
 5. The crown structure of zipper head according to claim 1, wherein the two through holes are fully slotted laterally in defining an open configuration.
 6. The crown structure of zipper head according to claim 1, wherein the resilient sheet has a V-shaped cross-sectional profile, and wherein the corners of the troughs are arched-shaped.
 7. The crown structure of zipper head according to claim 1, further comprising a plurality of apertures disposed on the side walls and communicates with the reception cavity.
 8. The crown structure of zipper head according to claim 7, further comprising two stop levers disposed in the reception cavity and engaged to the apertures.
 9. The crown structure of zipper head according to claim 1, further comprising two module plates disposed in the reception cavity and above the abutment portions. 